BS EN 60118-13:2011
$142.49
Electroacoustics. Hearing aids – Electromagnetic compatibility (EMC)
| Published By | Publication Date | Number of Pages |
| BSI | 2011 | 26 |
IEC 60118-13:2011 in principle covers all relevant EMC phenomena for hearing aids. Hearing aid immunity to high frequency electromagnetic fields originating from digital wireless devices operating in the frequency ranges 0,8 GHz to 0,96 GHz and 1,4 GHz to 2,48 GHz is currently identified as the only relevant EMC phenomenon regarding hearing aids. Future editions of this part of IEC 60118 may add tests for other frequency bands, as they come into more common use. IEC 61000-4-3 is the basis for relevant EMC tests to be conducted on hearing aids. Measurement methods and acceptance levels are described in this part of IEC 60118. This third edition cancels and replaces the second edition published in 2004 and constitutes a technical revision. It introduces a new set of requirements for use of hearing aids with mobile phones.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 7 | English CONTENTS |
| 8 | INTRODUCTION |
| 10 | 1 Scope 2 Normative references |
| 11 | 3 Terms and definitions |
| 12 | 4 Requirements for immunity Table 1 – Field strengths of RF test signals to be used to establish immunity for bystander compatible and user compatible hearing aids |
| 13 | 5 Immunity test procedures |
| 14 | Figures Figure 1 – Example of a test arrangement for hearing aid immunity measurements using a one-port TEM cell (asymmetric septum) |
| 15 | Figure 2 – Examples of input-output response curves at 1 000 Hz and the determination of gain at an input level of 55 dB Figure 3 – Positioning of hearing aid during RF exposure |
| 16 | 6 Measurement uncertainty Figure 4 – Examples of determination of IRIL by electromagnetic immunity (EMI) testing |
| 18 | Annex A (informative) Background for establishing test methods, performance criteria and test levels |
| 19 | Figure A.1 – Ratio of 1:2 between field strength and interference level in dB |
| 21 | Figure A.2 – Example of test arrangement for hearing aid immunity measurements using dipole antenna |
| 22 | Figure A.3 – Digital wireless devices antenna designs |
| 23 | Bibliography |
